<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        li{
            /* list-style:none 去掉样式;
            list-style-type: disc 实心圆|circle 空心圆|square 方块; */
            list-style-type: square;
        }
    </style>
</head>
<body>
    <ul>
    <li>html</li>
    <li>css</li>
    <li>javascript</li>
    </ul>
    
</body>
</html>